Finding the Third Proportional to 132,978 and 290,980

Step by Step Solution

1. Step 1: Write the proportion equation
   132,978 : 290,980 = 290,980 : x
2. Step 2: Convert to fraction form
   132,978/290,980 = 290,980/x
3. Step 3: Cross multiply
   132,978x = 290,980 × 290,980
4. Step 4: Simplify right side
   132,978x = 84,669,360,400
5. Step 5: Solve for x
   x = 84,669,360,400/132,978
6. Step 6: Final answer
   x = 636,717.05